A rare intraosseous schwannoma in the maxillary left incisor region: A case report

Publication date: Available online 13 January 2020Source: Journal of Oral and Maxillofacial Surgery, Medicine, and PathologyAuthor(s): Yuichiro Matsuoka, Asuka Iwamoto, Ryoji Yoshida, Taku Kojima, Masatoshi Hirayama, Nozomu Takahashi, Masafumi Nakamoto, Hideki NakayamaAbstractA schwannoma is a benign tumor arising from the Schwann cells of the neural sheath. An oral schwannoma is relatively rare. Moreover, an intraosseous schwannoma of the maxilla is extremely rare. Here, we report a schwannoma in the left incisor region of the maxilla. A 61-year-old male was referred to our hospital because of a painless swelling on the left incisor region of the maxilla. A computed tomography scan of the region showed bone resorption, and magnetic resonance images showed a well-defined, circumscribed lesion that was homogeneously hyperintense on T2-weighted images. The lesion was surgically resected after obtaining a definitive diagnosis by biopsy. Histopathological examination of the resected tumor using S-100 protein in an immunohistochemical staining revealed a schwannoma. At 21 months after the surgery, there is no evidence of recurrence or metastasis. To the best of our knowledge, here, we report a rare case of an intraosseous schwannoma of the maxilla. Clinicians, including oral surgeons, should use this study to better understand the clinical, radiological, and histological characteristics of schwannomas.
Source: Journal of Oral and Maxillofacial Surgery, Medicine, and Pathology - Category: ENT & OMF Source Type: research